Adelaide of Italy, also called Adelaide of Burgundy, was Holy Roman Empress by marriage to Emperor Otto the Great. She was crowned with him by Pope John XII in Rome on 2 February 962. She was the first empress designated consors regni, denoting a "co-bearer of royalty" who shared power with her husband. She was essential as a model for future consorts regarding both status and political influence. She was regent of the Holy Roman Empire as the guardian of her grandson in 991–995.

The Elder House of Welf was a Frankish noble dynasty of European rulers documented since the 9th century. Closely related to the Carolingian dynasty, it consisted of a Burgundian and a Swabian group. It has not been definitively clarified, however, whether the two groups formed one dynasty or whether they shared the same name by coincidence only. While the Elder House became extinct in the male line with the death of Duke Welf of Carinthia in 1055, his sister Kunigunde married into the Italian House of Este and became the ancestor of the (Younger) House of Welf.